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By: [ Editor ] Asked from United States of America

Particle grid acting like the ripple fx

Hi Everyone,

I am vfx and 3D artist learning the ways of programming and, I got a question for you guys. How could I create a ripple fx in Houdini, Maya and or XSI. I don't want to do it using fluid dynamics nor softbodies. It has to be done using particles. here is what I mean

http://www.youtube.com/watch?v=bqfrNraWtro

This was done using only particles, I am not sure of all of the details in terms of the actual process that was took place in the creating of this "river chocolate fx" but someone told me that those were all particles with math functions.

Anyways, like I said before I am in the learning path of programming so this will be a good exercise for me to play with however, so far my results ==0 I tried sin and cos functions with other fields but I just can't get it to work, ANY HINTS, I promise I'll make it look good once I know how to even start.

Cheers and happy fx

ps: The starting point is a grid of particles then ....???? Martin

  • 0

martin_61 [ Editor ]

Thanks so much Julian,

I have created two atttributes, the RampPosition V where I have added an "arrayMapper5.outValuePP and RampPositionU where I have added an "arraryMapper6.outValuePP.

This is the part that you guys provided to me and for the position of x and z I used the RampPosition V and RampPositionU.

float $pos[] = particleShape1.position;

float $pos[] = particleShape1.position;

particleShape1.position = <<particleShape1.rampPositionU, sin($pos[0] + frame/24), particleShape1.rampPositionV >>;

However this does not work. I get only one particle moving for like 10 frames then it disappears.

Sorry if I am totally off track however thank you for your help.

I couldn't post the image, I got an error saying that new users can't post images.

I'll just send you the maya file via email

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